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1 <br /> [�� KLEINFEtDER <br /> The groundwater flow was easter) to southeaster) at gradient approximately 0 004 <br /> 9 Y Y 9 pp Y <br /> ' feet per linear foot Benzene concentrations Increased in well MW-11 — TPH-G <br /> concentrations Increased In wells MW-1, MW-11 , SPA, SP-2, and SP-4 DIPE and <br /> ' TBA were the only oxygenates detected r-The plume of petroleum-Impacted <br /> groundwater covers a portion of the southern side of the subject site The TPH-G and <br /> benzene plume extends just beyond the property boundaries Historic measurements <br /> Indicate that the plume is stable and decreasing In most wells, while Increasing In some <br /> down-gradient wells <br /> The April 2005 quarterlygroundwater-monitoring event indicated that the groundwater <br /> J <br /> elevation Increased approximately 1 74 feet from the previous event performed In <br /> January 2005 During this event, the average depth to groundwater was 43 73 feet bgs <br /> ' (-27 06 feet ms]) The elevations ranged from -26 48 to -27 55 feet msl The <br /> groundwater flow was easterly to southeasterly at a gradient approximately 0 004 feet <br /> per linear foot Benzene concentrations increased In well PZ-1 TPH-G concentrations <br /> Increased in wells MWA, MW-12, SP-1, SP-2, SP-4, and SP-6 DIPE was the only <br /> oxygenates detected The plume of petroleum-Impacted groundwater covers a portion <br /> of the southern side of the subject site The TPH-G and benzene plume extends just <br /> beyond the property boundaries Historic measurements Indicate that the plume Is <br /> ' stable and decreasing In most wells, while increasing In some down-gradient wells <br /> C23-484517-BOOISAC5R610 Page 6 of 12 September 14, 2005 <br />' Copyright 2005 Kleinfelder Inc <br />